6-pack 25-ounce Seventh Generation Dish Liquid $15 at Amazon

Amazon has the 6-pack 25-ounce Seventh Generation Dish Liquid for $19 - 5% off with Subscribe & Save (can cancel at any time) - $3 off coupon (click "Clip this coupon") = $15 with free shipping. Hypo-allergenic dish detergent is biodegradable and made of natural products.